International journal of biological macromolecules | 2019
Antioxidant activity of a polysaccharide produced by Chaetomium globosum CGMCC 6882.
Abstract
In present work, a polysaccharide (GCP-WS) was successfully produced by Chaetomium globosum CGMCC 6882 from wheat straw. Monosaccharide composition of GCP-WS was rhamnose, glucosamine, galactose, glucose, xylose, fructose and glucuronic acid in a molar ratio of 21.46:1.58:1.11:55.15:36.37:7.04:7.34. Meanwhile, molecular weight of GCP-WS was 3.538\u202f×\u202f104\u202fDa with a polydispersity of 1.043. Antioxidant assays revealed GCP-WS had strong scavenging effects on DPPH radical, ABTS radical, superoxide anions and hydroxyl radical in a dose-dependent manner. Results displayed that at the concentration of 5\u202fmg/mL, the corresponding scavenging abilities of GCP-WS reached 83.08\u202f±\u202f2.58%, 85.69\u202f±\u202f1.62%, 79.38\u202f±\u202f2.03% and 81.39\u202f±\u202f1.47%, respectively. GCP-WS shows the potential for development as an effective antioxidant agent.